GODOX TT685II-N
Godox TT685II-N Speedlite User Manual
Model: TT685II-N
Brand: GODOX
1. Introduction
This user manual provides comprehensive instructions for the operation and maintenance of your Godox TT685II-N Speedlite. The TT685II-N is a versatile camera flash designed for Nikon cameras, offering advanced features such as I-TTL II autoflash, High-Speed Sync (HSS) up to 1/8000s, and a built-in Godox 2.4G Wireless X System for seamless integration into various lighting setups. Please read this manual thoroughly before use to ensure proper and safe operation.
2. What's in the Box
Upon opening the package, please verify that all the following items are included:
- Godox TT685II-N Camera Flash
- Mini Stand
- Protection Case
- User Manual
- USB Light
- Diffuser
- Filter

Image: All components included in the Godox TT685II-N Speedlite package.
3. Setup
3.1 Battery Installation
The TT685II-N Speedlite operates on four AA batteries. For optimal performance and recycle times, Ni-MH rechargeable batteries are recommended.
- Open the battery compartment cover located on the side of the flash unit.
- Insert four AA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Close the battery compartment cover securely.
3.2 Mounting to Camera
The Speedlite features a quick-release lock for secure and easy mounting onto your camera's hot shoe.
- Slide the flash hot shoe into your camera's hot shoe mount.
- Push the quick-release lock lever forward until it clicks into place, securing the flash.
- To remove, push the quick-release lock lever backward and slide the flash off the hot shoe.

Image: Quick-release lock for secure camera mounting.
4. Operating the Speedlite
4.1 Flash Modes
The TT685II-N supports various flash modes to suit different shooting scenarios. Press the MODE button to cycle through modes.
- I-TTL II Autoflash Mode: Automatically sets flash output for correct exposure. Supports FEC (Flash Exposure Compensation), FEB (Flash Exposure Bracketing), and FE Lock.
- Manual Flash Mode (M): Allows manual adjustment of flash power from 1/1 (full power) to 1/128 in 1/3 stop increments.
- Multi Flash Mode (Stroboscopic): Fires a series of rapid flashes to capture multiple images of a moving subject in a single frame. Adjustable frequency (Hz) and number of flashes.

Image: Overview of flash modes and sync options.
4.2 Sync Modes
- High-Speed Sync (HSS): Enables flash synchronization at all shutter speeds up to 1/8000s, useful for freezing fast motion or using wide apertures in bright conditions.
- First-Curtain Sync: Flash fires immediately after the first curtain opens.
- Second-Curtain Sync: Flash fires just before the second curtain closes, creating a trail effect for moving subjects.
4.3 Godox 2.4G Wireless X System
The TT685II-N features a built-in 2.4G wireless system, allowing it to function as a master or slave unit with other Godox X system compatible flashes and triggers.
- Master Mode: Controls other slave flashes. Supports groups A, B, C, D.
- Slave Mode: Triggered by a master unit. Supports groups A, B, C, D, E.
- Transmission Range: Approximately 100 meters.
- Channels: 32 (1-32) and ID (01-99) for interference-free operation.

Image: Godox 2.4G Wireless X System connectivity.

Image: Transmitter and Receiver Flash configurations.
4.4 TCM Instant Conversion
The TCM (TTL Converted to Manual) function allows for quick conversion of a TTL exposure value into a manual power setting. This helps in quickly finding a good starting point for manual flash settings.

Image: TCM function display.
4.5 Bounce Angle Adjustment
The flash head can be tilted from -7° to 120° and rotated 360° horizontally, providing flexible bounce flash angles for softer, more natural lighting.

Image: Broader Bounce Angle capability.
5. Specifications
| Feature | Description |
|---|---|
| Model | TT685II-N |
| Compatible Mountings | Nikon |
| Guide No. (1/1 output @ 200mm) | 60 (m ISO 100) / 190 (feet ISO 100) |
| Flash Coverage | 20 to 200mm (Auto zoom and Manual zoom) |
| Flash Duration | 1/300s to 1/20000s |
| Exposure Control System | I-TTL II autoflash and Manual flash |
| Multi Flash | Provided (up to 100 times, 199Hz) |
| Sync Mode | High-speed sync (up to 1/8000s), First-curtain sync, Second-curtain sync |
| Flash Exposure Compensation (FEC) | Manual. FEB: ±3 stops in 1/3 stop increments |
| Wireless Flash Function | Master, Slave, Off |
| Transmission Range (approx.) | 2.4G ≤ 100M |
| Channels | 32 (1-32) |
| ID | 01-99 |
| Auto Focus Assist Beam Effective Range | Center: 0.6-10m / 2.0-32.8ft; Periphery: 0.6-5m / 2.0-16.4ft |
| Power Supply | Ni-MH battery (recommended) or LR6 alkaline battery * 4 |
| Full Power Flashes | Approx. 330 times |
| Recycle Time | 0.1-2.6s (rechargeable Ni-MH battery) |
| Power Saving | Automatically powers off after approx. 90s of idle operation (60 minutes if set as Receiver) |
| Sync Triggering Mode | Hotshoe, 2.5mm sync line |
| Dimensions (W x H x D) | 64 x 76 x 190 mm |
| Weight without battery | 405g |
| Weight with battery | 489g |

Image: Detailed product specifications.
6. Troubleshooting
If you encounter issues with your Godox TT685II-N Speedlite, please refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Flash does not fire. |
|
| Flash output is too dark/bright. |
|
| Slow recycle time. |
|
| Wireless triggering issues. |
|
7. Maintenance
To ensure the longevity and optimal performance of your Godox TT685II-N Speedlite, follow these maintenance guidelines:
- Keep the flash unit dry. Do not expose it to rain, moisture, or high humidity.
- Clean the flash body with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth with mild detergent, then wipe dry.
- Avoid touching the flash tube directly with bare hands, as oils can reduce its lifespan. If touched, clean with a lint-free cloth and alcohol.
- Store the flash in its protection case when not in use to prevent dust and scratches.
- Remove batteries if the flash will not be used for an extended period to prevent leakage.
- Avoid strong impacts or dropping the unit.
- Do not attempt to disassemble or repair the flash yourself. Refer to authorized service personnel.
8. Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or visit the official Godox website. Keep your purchase receipt as proof of purchase for warranty claims.
Manufacturer: Godox
Date First Available: November 8, 2021
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.